So far, I'm very pleased with the Onite battery I got. I've been calibrating it over the past few weeks and I'm consistently getting ~1570 mAh out of it. Two caveats, though:
1. I've only been using it for about two months, so who knows if it will last; but so far, so good...
2. There's the problem with battery eye that I'm asking about in the linked thread, but I suspect that doesn't have to do with the battery itself...